<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>
        input[type="text"]{
            width: 500px;
            height: 30px;
            background-image: url("../images/用户.svg");
            background-repeat: no-repeat;
            /*背景大小，宽，高*/
            background-size: 30px 30px;
            /*设置背景位置：左   右*/
            background-position: 470px 0px;
        }

        input[type="password"]{
            width: 500px;
            height: 30px;
            background-image: url("../images/密码.svg");
            background-repeat: no-repeat;
            /*背景大小，宽，高*/
            background-size: 30px 30px;
            /*设置背景位置：左   右*/
            background-position: 470px 0px;
        }
        input[type="submit"]{
            width: 100%;
            height: 30px;
            background: cornflowerblue;
            color:white;
            letter-spacing: 15px;
            font-weight: 700;

        }
    </style>
</head>
<body>
    <form action="#">
        <table>
            <tr>
                <td>用户名</td>
                <td>
                    <input type="text" name="username">
                </td>
            </tr>
            <tr>
                <td>密码</td>
                <td>
                    <input type="password" name="password">
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    <input type="submit" value="立即注册">
                </td>
            </tr>
        </table>
    </form>
</body>
</html>